Varāha-uddhāraṇa and the Re-constitution of Bhū-maṇḍala
Earth after Pralaya
कृत्रिमाणां च दुर्गाणां विष्कम्भायाममेव च / योजनादर्द्धविष्कम्भमष्टभागाधिकायतम्
kṛtrimāṇāṃ ca durgāṇāṃ viṣkambhāyāmameva ca / yojanādarddhaviṣkambhamaṣṭabhāgādhikāyatam
Even for man-made fortresses, the rule of breadth and length is this: the breadth is half a yojana, and the length exceeds it by one eighth.